libgdiplus: bump to version 4.2

Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libgdiplus/libgdiplus.hash

@@ -1,2 +1,2 @@
 # Locally computed:
-sha256 7eadc5105c6352d456c5f8699dc89260bf402e82ce6668e7e0c625519f9e5b44 libgdiplus-3.12.tar.gz
+sha256 98f8a8e58ed22e136c4ac6eaafbc860757f5a97901ecc0ea357e2b6e4cfa2be5 libgdiplus-4.2.tar.gz

package/libgdiplus/libgdiplus.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBGDIPLUS_VERSION = 3.12
+LIBGDIPLUS_VERSION = 4.2
 LIBGDIPLUS_SITE = $(call github,mono,libgdiplus,$(LIBGDIPLUS_VERSION))
 
 # Although there is a LICENSE file thas specifies LGPL or MPLv1.1,